public static Constant ExtractConstantFromValue (TypeSpec t, object v, Location loc)
{
switch (t.BuiltinType) {
case BuiltinTypeSpec.Type.Int:
if (v is int)
return new IntConstant (t, (int) v, loc);
break;
case BuiltinTypeSpec.Type.String:
if (v is string)
return new StringConstant (t, (string) v, loc);
break;
case BuiltinTypeSpec.Type.UInt:
if (v is uint)
return new UIntConstant (t, (uint) v, loc);
break;
case BuiltinTypeSpec.Type.Long:
if (v is long)
return new LongConstant (t, (long) v, loc);
break;
case BuiltinTypeSpec.Type.ULong:
if (v is ulong)
return new ULongConstant (t, (ulong) v, loc);
break;
case BuiltinTypeSpec.Type.Float:
if (v is float)
return new FloatConstant (t, (float) v, loc);
break;
case BuiltinTypeSpec.Type.Double:
if (v is double)
return new DoubleConstant (t, (double) v, loc);
break;
case BuiltinTypeSpec.Type.Short:
if (v is short)
return new ShortConstant (t, (short) v, loc);
break;
case BuiltinTypeSpec.Type.UShort:
if (v is ushort)
return new UShortConstant (t, (ushort) v, loc);
break;
case BuiltinTypeSpec.Type.SByte:
if (v is sbyte)
return new SByteConstant (t, (sbyte) v, loc);
break;
case BuiltinTypeSpec.Type.Byte:
if (v is byte)
return new ByteConstant (t, (byte) v, loc);
break;
case BuiltinTypeSpec.Type.Char:
if (v is char)
return new CharConstant (t, (char) v, loc);
break;
case BuiltinTypeSpec.Type.Bool:
if (v is bool)
return new BoolConstant (t, (bool) v, loc);
break;
case BuiltinTypeSpec.Type.Decimal:
if (v is decimal)
return new DecimalConstant (t, (decimal) v, loc);
break;
}
if (t.IsEnum) {
var real_type = EnumSpec.GetUnderlyingType (t);
return new EnumConstant (CreateConstantFromValue (real_type, v, loc), t);
}
if (v == null) {
if (t.IsNullableType)
return Nullable.LiftedNull.Create (t, loc);
if (TypeSpec.IsReferenceType (t))
return new NullConstant (t, loc);
}
return null;
}
